Ioannis E Dagklis1, Efthymia Tsantaki2, Dimitrios Kazis3, Varvara Theodoridou3, Sotirios Papagiannopoulos3, Dimitrios Ntantos3, Sevasti Bostantjopoulou3. 1. 3rd Department of Neurology, Aristotle University of Thessaloniki, G. Papanikolaou Hospital, Thessaloniki, Greece. gdag2005@yahoo.gr. 2. Laboratory of Primary Health Care, General Practice and Health Services Research - Medical School, Aristotle University of Thessaloniki, Thessaloniki, Greece. 3. 3rd Department of Neurology, Aristotle University of Thessaloniki, G. Papanikolaou Hospital, Thessaloniki, Greece.
Abstract
OBJECTIVE: Fatigue is one of the most frequent and important nonmotor symptoms of patients with Parkinson disease (PD), affecting quality of life. Although, in some cases, it may be a severe and debilitating complaint, it remains relatively unexplored. The PFS-16 is a fatigue measure, specifically designed for PD patients. The aim of this study was to investigate the psychometric properties of Parkinson fatigue scale (PFS-16) in Greek PD patients. METHODS: In total, 99 patients with PD were assessed. The following psychometric properties were tested: data quality, floor/ceiling effects, reliability (internal consistency, test-retest reliability), and construct validity. Construct validity was evaluated by examining correlations with other variables including other fatigue measures such as Fatigue Severity Scale (FSS) and the vitality scale (SF-VT) of SF-36. Moreover, assumptions were explored about "known" groups concerning fatigue. RESULTS: The mean score for the PFS-16 was 2.95 (± 0.91); acceptability was good with negligible floor and ceiling effects. Results showed high internal consistency (Cronbach's alpha, 0.96) and test-retest reliability (ICC, 0.93). Strong correlations were observed between the PFS-16 and other fatigue (FFS and SF-VT) measures (rs = 0.77 and - 0.70, p < 0.001), revealing appropriate validity. Furthermore, predictions for "known" groups validity were verified. CONCLUSION: The Greek version of the PFS-16 showed satisfactory reliability and validity and thus can be regarded as a useful tool in assessing fatigue in PD.
OBJECTIVE:Fatigue is one of the most frequent and important nonmotor symptoms of patients with Parkinson disease (PD), affecting quality of life. Although, in some cases, it may be a severe and debilitating complaint, it remains relatively unexplored. The PFS-16 is a fatigue measure, specifically designed for PDpatients. The aim of this study was to investigate the psychometric properties of Parkinson fatigue scale (PFS-16) in Greek PDpatients. METHODS: In total, 99 patients with PD were assessed. The following psychometric properties were tested: data quality, floor/ceiling effects, reliability (internal consistency, test-retest reliability), and construct validity. Construct validity was evaluated by examining correlations with other variables including other fatigue measures such as Fatigue Severity Scale (FSS) and the vitality scale (SF-VT) of SF-36. Moreover, assumptions were explored about "known" groups concerning fatigue. RESULTS: The mean score for the PFS-16 was 2.95 (± 0.91); acceptability was good with negligible floor and ceiling effects. Results showed high internal consistency (Cronbach's alpha, 0.96) and test-retest reliability (ICC, 0.93). Strong correlations were observed between the PFS-16 and other fatigue (FFS and SF-VT) measures (rs = 0.77 and - 0.70, p < 0.001), revealing appropriate validity. Furthermore, predictions for "known" groups validity were verified. CONCLUSION: The Greek version of the PFS-16 showed satisfactory reliability and validity and thus can be regarded as a useful tool in assessing fatigue in PD.
Authors: Jennifer G Goldman; Glenn T Stebbins; Vania Leung; Barbara C Tilley; Christopher G Goetz Journal: Parkinsonism Relat Disord Date: 2014-08-13 Impact factor: 4.891
Authors: Joseph H Friedman; Richard G Brown; Cynthia Comella; Carol E Garber; Lauren B Krupp; Jau-Shin Lou; Laura Marsh; Lillian Nail; Lisa Shulman; C Barr Taylor Journal: Mov Disord Date: 2007-02-15 Impact factor: 10.338
Authors: Joseph H Friedman; James C Beck; Kelvin L Chou; Gracia Clark; Christopher P Fagundes; Christopher G Goetz; Karen Herlofson; Benzi Kluger; Lauren B Krupp; Anthony E Lang; Jao-Shin Lou; Laura Marsh; Anne Newbould; Daniel Weintraub Journal: NPJ Parkinsons Dis Date: 2016-01-14